/**
 * Copyright (c) 2011-2013, James Zhan 詹波 (jfinal@126.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.jfinal.kit;

import com.jfinal.sog.kit.StringPool;

import java.io.File;
import java.net.URL;

/**
 * new File("..\path\abc.txt") 中的三个方法获取路径的方法
 * 1： getPath() 获取相对路径，例如   ..\path\abc.txt
 * 2： getAbslutlyPath() 获取绝对路径，但可能包含 ".." 或 "." 字符，例如  D:\otherPath\..\path\abc.txt
 * 3： getCanonicalPath() 获取绝对路径，但不包含 ".." 或 "." 字符，例如  D:\path\abc.txt
 */
public class PathKit {

    private static String webRootPath;
    private static String rootClassPath;

    @SuppressWarnings("rawtypes")
    public static String getPath(Class clazz) {
        String path = clazz.getResource(StringPool.EMPTY).getPath();
        return new File(path).getAbsolutePath();
    }

    public static String getPath(Object object) {
        String path = object.getClass().getResource(StringPool.EMPTY).getPath();
        return new File(path).getAbsolutePath();
    }

    public static String getRootClassPath() {
        if (rootClassPath == null) {
            final URL resource = PathKit.class.getClassLoader().getResource(StringPool.EMPTY);
            if (resource == null) {
                return rootClassPath;
            }
            try {
                String path = resource.toURI().getPath();
                rootClassPath = new File(path).getAbsolutePath();
            } catch (Exception e) {
                String path = resource.getPath();
                rootClassPath = new File(path).getAbsolutePath();
            }
        }
        return rootClassPath;
    }

    public static String getPackagePath(Object object) {
        Package p = object.getClass().getPackage();
        return p != null ? p.getName().replaceAll("\\.", StringPool.SLASH) : StringPool.EMPTY;
    }

    public static File getFileFromJar(String file) {
        throw new RuntimeException("Not finish. Do not use this method.");
    }

    public static String getWebRootPath() {
        if (webRootPath == null)
            webRootPath = detectWebRootPath();
        return webRootPath;
    }

    public static void setWebRootPath(String webRootPath) {
        if (webRootPath == null)
            return;

        if (webRootPath.endsWith(File.separator))
            webRootPath = webRootPath.substring(0, webRootPath.length() - 1);
        PathKit.webRootPath = webRootPath;
    }

    private static String detectWebRootPath() {
        try {
            String path = PathKit.class.getResource(StringPool.SLASH).toURI().getPath();
            return new File(path).getParentFile().getParentFile().getCanonicalPath();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}


